Amblyopia, or Lazy Eye, is a reduced vision, generally in only one eye. The condition usually results from poor eye co-ordination, from having a turned eye, or after having one eye which requires a far greater lens power.

The reduced vision occurs because, for one or more of the above reasons, one eye is being used less than the other. When detected early enough, patching, vision training and lenses may help to reverse or prevent permanent damage to the vision.